Author Archives: gravityloss

We use orders of magnitude here, so powers of ten. Elon Musk presented the Terafab idea yesterday, here.The idea is to manufacture so many chips per year that they would use a terawatt of power, or 10^12 W. US electricity … Continue reading →

Solar, wind and nuclear are already causing closing of many coal plants.Energy usage has plateaued in the west and everybody’s CO2 intensity is going down, see previous post and any news about China. AI is increasing energy usage but there’s … Continue reading →

Let’s look at three example regions: China, EU and USA. All graphs from https://ourworldindata.org/ In electricity generation China is still growing, while the others have plateaued. Everybody’s carbon intensity is going down. So, as an upshot, CO2 emissions per capita … Continue reading →

Highlighting some similarities where features of an older design can sometimes, if squinting right, be found in newer designs. Sometimes it’s fairly obvious, sometimes slightly surprising. (All images created with Gemini) Ramp inlets F-15 is iconic, but everyone knows it … Continue reading →

Energy storage is needed to solve the variability of renewable energy. Main contenders are hydrogen and batteries. These can be built in regions that don’t have large lakes or mountains for leveling hydropower. Which ones should we build? To get … Continue reading →

Fossil fuels have been cheap. They have been used to produce electricity, reduce iron, make fertilizers and heat homes.This has caused large carbon dioxide and methane emissions that can not continue. Fossil fuels will be phased out. Electricity Nuclear power … Continue reading →

Histories and documentaries of aircraft tend to just plainly list aircraft performance. The next generation of aircraft is just better than the previous one, but it’s rarely explained how this is possible.This is especially curious regarding aircraft like the F-4 … Continue reading →

Based on the fly through video published in spring 2022 Body Inner body panels arrive pre-cut to rough shape at 0:20 They are shown to be stamped to a 3d shape, and the extra is cut off at 0:23 The … Continue reading →

The VTOL variant, F-35B, has the lift fan behind the cockpit. This means weapons bays or the inlet ducts can not be on the centerline, behind the cockpit – instead they are on the sides. This applies to all the … Continue reading →